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    • 3. 发明授权
    • Method for removing metal foot during high-k dielectric/metal gate etching
    • 在高k电介质/金属栅极蚀刻期间去除金属脚的方法
    • US07579282B2
    • 2009-08-25
    • US11331786
    • 2006-01-13
    • Shahid RaufOlubunmi O. AdetutuEric D. LuckowskiPeter L. G. Ventzek
    • Shahid RaufOlubunmi O. AdetutuEric D. LuckowskiPeter L. G. Ventzek
    • H01L21/285H01L21/3065
    • H01L21/02071H01L21/28088H01L21/32136H01L21/32137H01L21/32139H01L29/4966H01L29/517H01L29/518
    • A metal layer etch process deposits, patterns and anisotropically etches a polysilicon layer (24) down to an underlying metal layer (22) to form an etched polysilicon structure (54) with polymer layers (50, 52) formed on its sidewall surfaces. The polymer layer (50, 52) are removed to expose an additional surface area (60, 62) of the metal layer (22), and dielectric layers (80, 82) are formed on the sidewall surfaces of the etched polysilicon structure (54). Next, the metal layer (22) is plasma etched to form an etched metal layer (95) with substantially vertical sidewall surfaces (97, 99) by simultaneously charging the dielectric layers (80, 82) to change plasma ion trajectories near the dielectric layers (80, 82) so that plasma ions (92, 94) impact the sidewall surfaces (97, 99) in a more perpendicular angle to enhance etching of the sidewall surfaces (97, 99) of the etched metal layer (95).
    • 金属层蚀刻工艺沉积,图案和各向异性地将多晶硅层(24)向下蚀刻到下面的金属层(22)以形成蚀刻的多晶硅结构(54),其上形成有在其侧壁表面上的聚合物层(50,52)。 去除聚合物层(50,52)以暴露金属层(22)的另外的表面区域(60,62),并且在蚀刻的多晶硅结构(54)的侧壁表面上形成介电层(80,82) )。 接下来,通过同时对电介质层(80,82)充电以改变电介质层附近的等离子体离子轨迹,等离子体蚀刻金属层(22)以形成具有基本上垂直的侧壁表面(97,99)的蚀刻金属层(95) (80,82),使得等离子体离子(92,94)以更垂直的角度冲击侧壁表面(97,99)以增强蚀刻金属层(95)的侧壁表面(97,99)的蚀刻。
    • 10. 发明授权
    • CMOS integration with metal gate and doped high-K oxides
    • CMOS与金属栅极和掺杂的高K氧化物的集成
    • US08309419B2
    • 2012-11-13
    • US12365317
    • 2009-02-04
    • James K. SchaefferEric D. Luckowski
    • James K. SchaefferEric D. Luckowski
    • H01L21/8238
    • H01L21/823807H01L21/823857H01L29/1054H01L29/4966H01L29/513H01L29/517
    • A method and apparatus are described for fabricating single metal gate electrodes (35, 36) over a high-k gate dielectric layer (31, 32) that is separately doped in the PMOS and NMOS device areas (96, 97) by forming first capping oxide layer (23) with a first dopant species on a high-k gate dielectric layer (22) in at least the NMOS device area and also forming second capping oxide layer (27) with a second dopant species on a high-k gate dielectric layer (22) in at least the PMOS device area, where the first and second dopant species are diffused into the gate dielectric layer (22) to form a first fixed charge layer (31) in the PMOS device area of the high-k gate dielectric area and a second fixed charge layer (32) in the NMOS device area of the high-k gate dielectric area.
    • 描述了用于在高k栅极电介质层(31,32)上制造单个金属栅极(35,36)的方法和装置,其通过形成第一封盖而分别地掺杂在PMOS和NMOS器件区域(96,97)中 至少在NMOS器件区域中的高k栅极电介质层(22)上具有第一掺杂剂物质的氧化物层(23),并且还在高k栅极电介质上形成具有第二掺杂物种类的第二覆盖氧化物层(27) 至少PMOS器件区域中的第二层(22),其中第一和第二掺杂物种类扩散到栅介质层(22)中,以在高k栅极的PMOS器件区域中形成第一固定电荷层(31) 电介质区域和在高k栅极电介质区域的NMOS器件区域中的第二固定电荷层(32)。